99945212219 has 4 divisors (see below), whose sum is σ = 102071706144. Its totient is φ = 97818718296.

The previous prime is 99945212197. The next prime is 99945212231. The reversal of 99945212219 is 91221254999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99945212219 - 2⁸ = 99945211963 is a prime.

It is a super-2 number, since 2×99945212219² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99945212249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063246892 + ... + 1063246985.

It is an arithmetic number, because the mean of its divisors is an integer number (25517926536).

Almost surely, 2^99945212219 is an apocalyptic number.

99945212219 is a deficient number, since it is larger than the sum of its proper divisors (2126493925).

99945212219 is a wasteful number, since it uses less digits than its factorization.

99945212219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126493924.

The product of its digits is 1049760, while the sum is 53.

The spelling of 99945212219 in words is "ninety-nine billion, nine hundred forty-five million, two hundred twelve thousand, two hundred nineteen".